(19)
(11) EP 1 419 397 A1

(12)

(43) Date of publication:
19.05.2004 Bulletin 2004/21

(21) Application number: 02757333.6

(22) Date of filing: 22.08.2002
(51) International Patent Classification (IPC)7G01R 23/10
(86) International application number:
PCT/US2002/026839
(87) International publication number:
WO 2003/019206 (06.03.2003 Gazette 2003/10)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 23.08.2001 US 938136

(71) Applicant: Warburton, William K.
Menlo Park, CA 94025 (US)

(72) Inventors:
  • WARBURTON, William, K.
    Menlo Park, CA 94025 (US)
  • WAHL, John
    Fremont, CA 94538 (US)
  • MOMAYEZI, Michael
    Fremont, CA 94043 (US)

(74) Representative: Skone James, Robert Edmund et al
GILL JENNINGS & EVERYBroadgate House7 Eldon Street
London EC2M 7LH
London EC2M 7LH (GB)

   


(54) ULTRA-LOW BACKGROUND GAS-FILLED ALPHA COUNTER